/*
 * JavaScript Pretty Date
 * Copyright (c) 2008 John Resig (jquery.com)
 * Licensed under the MIT license.
 */
var PrettyDate = {};

PrettyDate.converter = function(){
	// Takes an ISO time and returns a string representing how
	// long ago the date represents.
	function prettyDate(time){
		var date = new Date((time || "").replace(/-/g,"/").replace(/[TZ]/g," ")),
			diff = (((new Date()).getTime() - date.getTime()) / 1000),
			day_diff = Math.floor(diff / 86400);
				
		if ( isNaN(day_diff) || day_diff < 0 || day_diff >= 31 )
			return;
				
		return day_diff == 0 && (
				diff < 60 && "just now" ||
				diff < 120 && "a minute ago" ||
				diff < 3600 && Math.floor( diff / 60 ) + " minutes ago" ||
				diff < 7200 && "an hour ago" ||
				diff < 86400 && Math.floor( diff / 3600 ) + " hours ago") ||
			day_diff == 1 && "yesterday" ||
			day_diff > 1 && day_diff + " days ago";
	};
	
	this.convert =  prettyDate;
	
	// If jQuery is included in the page, adds a jQuery plugin to handle it as well
	
	if ( typeof jQuery != "undefined" )
		jQuery.fn.prettyDate = function(){
			return this.each(function(){
				var date = prettyDate(this.title);
				if ( date )
					jQuery(this).text( date );
			});
		};
};